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Problems which flow controlling devices and injection mouths were unfit for multi-end surface cast, would directly affect the casting quality.
The sink flow was also an important factor in nonmetallic inclusions.
This flow had the mechanical properties which separated and floated the inclusions.

Experimental Modal Analysis of CNC High Precision Surface Grinder with Horizontal Spindle and Rotary Table MGK7350 Yong Cai1,a, Zeyu Weng 1,b , Nannan Zhang1,c , Jinhua Yang2,d, Weihua Yuan3,e 1 Key Laboratory of Mechanical Manufacture and Automation of Ministry of Education, Hangzhou Zhejiang 310014, China; 2 Hangzhou Dalu Industry Corporation, Xiaoshan,Hangzhou 311234, Zhejiang, China 3 Hangzhou Machine Tool Group Corporation, Hangzhou Zhejiang 310022, China a zjut_cy@163.com， b Wengzy@mail.hz.zj.cn, czn5148534@126.com d HDLRONGGE112@163.com, eywh7511@yahoo.com.cn Keywords: Modal analysis, Modal test, Modal sharp, Weak link Abstract:The dynamic characteristic of CNC high precision surface grinder with horizontal spindle and rotary table MGK7350 was studied by using modal test.
And the working performance and cutting efficiency of machine tools are closely related to its dynamic characteristics which will directly affect machining quality and machining efficiency of machine tools.
Currently, it has become a important indicator to measure structure and properties of machine tool.
（4） Where prφ = mode sharp factor of point P of mode r, ( )pf jω = the incentive at point P.

An important factor affecting the level of interdiffusion is the cure temperature.
Cure temperature is known to affect the interdiffusion process since both the viscosity and gelation time, which influence the interphase thickness and morphology, depend on temperature [6,7].
The authors propose as future work the mechanical characterization of the interphase using nanoindentation and conducting further fractographic analysis with scanning electron microscopy.
Furthermore, studying residual stresses is considered to be also important to understand the underlying factors in the fracture behavior of hybrid composites.
Baran, Co-Bonded Hybrid Thermoplastic-Thermoset Composite Interphase: Process-Microstructure-Property Correlation, Materials 14 (2021) 291

Introduction: The foundation of nano technology, introduced control over matter at the nano-meter scale, has shaped a new class of materials with novel properties, creating new potential in a variety of domains.
The condensed dimensions of the particles is a key factor leading to the opportunity of improvement and fabrication of novel materials properties like electrical, optical and chemical which, at such range, become size and/or shape dependent.
Improved the mechanical properties, tunable light scattering or luminescence due to quantum size effects, are examples of features that can be controlled at the nanoscale.
The CdSe-CdS quantum dot-in-rods has optical properties that are comparable with other materials in terms of PLQY.
Conclusion: The quantum size effect refers to the change in the electronic energy level density according to the size of nano-particle on its electrical and optical properties.

However, it does not have a clear mechanical meaning and, therefore it cannot be used as a single parameter for characterising mechanical properties of materials.
Therefore, it is supposed that not only the mechanical properties of the material are known but also the shape of the punch and the external force parameter P of the problem are given.
Contact problems and evaluation of material properties.
The author believes that both factors may influence the observed changes of measured values of hardness depending on the depth of indentation.
Although these reviews were published [122, 123], the author believes that this paper gives further information concerning the methods for extracting mechanical properties of materials from load-displacement curves.

This affects the grinding thermal performance significantly.
The commonly used AE feature parameters for the AE monitoring are the peak of RMS values, crest factors analysis (i.e. the ratio of the peak to the RMS level of a signal), kurtosis analysis and moving average technique.
All aforementioned ANN models used in grinding monitoring were trained directly from the AE signals in grinding processes, which included not only thermal AE signals but also mechanical AE signals from mechanical deformation of materials and machine tools as well as environment noise.
This could be due to the material property changes at high temperature.
Kannateyasibu, International Journal of Mechanical Sciences, 1980. 22(5): p. 285-296

Moreover, when applied to free vibration, TA can provide only short-circuit (SC) modal properties.
Besides, it was also shown [23] that the EP condition affects more the EMCC than does the HOP.
The new Eq. 17 also shows that the TA approach can be used for free-vibration analysis that can provide SC modal properties only.
More interesting, IP-based eigenvalues problems are insensitive to the electric BC; i.e. both SC and OC eigenvalues problems provide the same modal properties; care then should be taken when using this concept for the evaluation of the EMCC (see Eq. 26 and its preceding text).
Above mechanical updating could be complemented by an electric one [4].

Besides, we can also analyze using the simulation of Rhapsody as follows: 1) realize various failure modes in the software system model; 2) judge whether the running characteristics of software system after injecting failure mode is in violation of the property requirement, which is given in the phase of the definition.
If there are mistakes or imperfections in the design of a module,or the design of the module does not meet the original requirements of the software (unless the design of the protection for unusual incident has been done, the module still meets the requirements of the software under the failure), it will affect the ability of the original properties of the module to meet the software requirements specification.
Through the changes of state diagram, affect will be displayed intuitively, but in the traditional FMEA, it is difficult to sort out the clues of a series of effects generated by messages.
FMEA analysis based on modeling and simulation in Rhapsody is still a kind of qualitative effects analysis based on failure modes, but in the process of simulation, we can analyze the impact of the failure of multiple factors.
Mechanical & Electrical Engineering Magazine. 2004, 21(3): 8-12

Fig. 2 Damage of specimens Fig. 3 Damage of specimens Deformation Properties and Ductility In conjunction with Fig. 2, Fig. 3 shows the damage, found specimen conversion layer over the layer member is more serious damaged, and further observed that the conversion layer member despite a certain degree of damage, but occurs mainly populated block destruction, the ribs are not significantly affected cell, then its capacity has not changed significantly.
Ductility factor reflects the structure or component into the plastic deformation phase indicator, and its expression is: (1) Where, Δu is the limit destruction of the specimen displacement test data taken down to the limit value of the load corresponding to 85% of the displacement, Δy is the yield displacement of the specimen.
Conclusions The bottom frame ribbed composite wall structure of its conversion layer took place shear failure mode of destruction, highlighting the wall three phases mechanical characteristics and reflecting the wall blocks.

Introduction As construction material, concrete has been widely used in many engineering field and concrete properties have been studied by more and more researchers [1-2].
The method has the great requirement of surface features and illumination because of correlation calculation of intensity distribution; Correlation calculation is implemented through transition of subregion and affected by rigid body rotation.
References [1] Wu Lang, Fang Shuiping, Wan Ni, "Experimental research on tensile strength of concrete at early age", Jiangxi Science, vol 25, 2007, p. 175-178 [2] Hu Shisheng, Wang Daorong, Liu Jianfei, "Experimental study of dynamic mechanical behavior of concrete", Engineering Mechanics, vol 18, 2001, p. 115-118 [3] Huang Chengkui, Shang Renjie, Zhao Guofan, "Test method for concrete under dynamic tension", Journal of Dalian University of Technology, vol 37, 1997, p. 111-114 [4] Gao Shuling, Xu Shilang, "Critical concrete crack length determination using strain gauges", Journal of Tsinghua University (Science and Technology), vol 47, 2007, p. 1432-1434 [5] S.R.
"Sutton, Estimation of stress intensity factor by digital image correlation", Engng Fract Mech, vol 28, 1987, p. 101-112 [6] Yang Jing, "Displacement Measurement Based on Speckles White Light Diffraction", Applied Science and Technology, vol 29, 2002, p.49-51